* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  overflow: hidden; /* 禁止滚动条 */
}
body {
  height: 100vh;
}
.card {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: 1fr;
  overflow: visible;
}
.card_content {
  padding: 2px;
  box-sizing: border-box;
  width: 100%;
  height: 100%;
  grid-row: 1;
  grid-column: 1;
  z-index: 1;
}

.card_title {
  width: 100%;
  height: 35px;
  line-height: 35px;
  text-align: center;
  background: linear-gradient(to right, #05174d 0%, #043b9a 50%, #05174d 100%);
  box-sizing: border-box;
}

.card_title span {
  line-height: 35px;
  font-size: 23px;
  font-weight: bolder;
  letter-spacing: 2px;
  color: white;
}
.card_background {
  position: relative;
  width: 100%;
  height: 100%;
  background-color: #05174d;
  border: #20489b 1px solid;
  grid-row: 1;
  grid-column: 1;
  z-index: 0;
  overflow: visible;
}
.card_background > :nth-child(1) {
  position: absolute;
  top: -2px;
  left: -2px;
  border-left: 3px solid #20489b;
  border-top: 3px solid #20489b;
  width: 20px;
  height: 20px;
}

.card_background > :nth-child(2) {
  position: absolute;
  top: -2px;
  right: -2px;
  border-top: 3px solid #20489b;
  border-right: 3px solid #20489b;
  width: 20px;
  height: 20px;
}

.card_background > :nth-child(3) {
  position: absolute;
  bottom: -2px;
  left: -2px;
  border-left: 3px solid #20489b;
  border-bottom: 3px solid #20489b;
  width: 20px;
  height: 20px;
}

.card_background > :nth-child(4) {
  position: absolute;
  bottom: -2px;
  right: -2px;
  border-bottom: 3px solid #20489b;
  border-right: 3px solid #20489b;
  width: 20px;
  height: 20px;
}
/* 整个滚动条 */
::-webkit-scrollbar {
  display: none;
}
